METHOD OF EVALUATING DISCHARGE PERFORMANCE OF DROPLET DISCHARGE HEAD, METHOD OF DECIDING MAINTENANCE TIMING OF DROPLET DISCHARGE HEAD, METHOD OF PREDICTING AND DECIDING SERVICE LIFE OF DROPLET DISCHARGE HEAD AND APPARATUS FOR EVALUATING DISCHARGE PERORMANCE OF DROPLET DISCHARGE HEAD

PROBLEM TO BE SOLVED: To evaluate the change of a droplet discharge head with time based on the change of the discharge quantity of each discharge nozzle as evaluation reference. SOLUTION: The method for evaluating the discharge performance of droplets comprises: a first discharge quantity measuring...

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Bibliographische Detailangaben
Hauptverfasser:	WATABE YUTAKA, UDA TOMOHIKO, IGARASHI HIROKO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PRINTING PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SELECTIVE PRINTING MECHANISMS SPRAYING OR ATOMISING IN GENERAL STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To evaluate the change of a droplet discharge head with time based on the change of the discharge quantity of each discharge nozzle as evaluation reference. SOLUTION: The method for evaluating the discharge performance of droplets comprises: a first discharge quantity measuring step of measuring the discharge quantity of a plurality of the discharge nozzles 21; a second discharge quantity measuring step of measuring the discharge quantity of the plurality of the discharge nozzles 21 after a fixed time is passed from the first discharge quantity measuring step; a substraction calculation step of calculating a value obtained by reducing the discharge qunatity measured in the first discharge quantity measuring step from the discharge quantity measured in the second discharge quantity measuring step in each discharge nozzle 21; a standard deviation calculation step of calculating the standard deviation of each calculated value; and a head evaluating step of evaluating the change of the performance of a functional liquid droplet discharge head 1 with time based on the standard deviation. COPYRIGHT: (C)2010,JPO&INPIT